So do I. Cars from the 70s-early 2010s are much easier to make than late 2010s-early 2020s vehicles because of the same reasons you have stated earlier:
Rayton Sabrome, Ibishu Velmor, Seoil Corda IAN and Gavril Mione used to be in this pack (at least according to update log) but now they don't exist anymore here
i used to have the legacy pack but they are gone from there i think they are too outdated to use and need a full rework i heard the mione broke the covet
But that was the -OLD- Covet. So in theory, if you have the old one installed as a mod, the Mione should work - although the old Covet will be a bit broken.
I just used the Mione yesterday, and spawned in a covet to see if it still deleted the rear breaks of the Covet, and the newer updated Covet works just fine with all parts still existing with the Mione loaded in.
WBIMP was amazing, added a lot of really neat cars, but also at the same time a lot of them were really scuffed or low quality in terms of some (And I mean SOME) models and some textures go. Though I believe a few members who worked on WBIMP have gone on to either release their own separate mods, or in the case of Kueso and LJ came out with KJLP which is sort of a successor but not really to WBIMP.
bruh why they gotta be removed, maybe if theyre broken, he can put them in a seperate file for those who wanna fix them to post idk